Reenforced envelope



July 6, 1937. M. FARRELL *REENFORCED ENVELOPE Filed Jan. 9, 1936";

ATTORNEY5 Patented July 6, 1937 UNITED STATES PATENT OFFICE REENFORCED' ENVELOPE Mark Farrell, Detroit, Mich. Application January 9, 1936, Serial No, 58,269

4 Claims.

This invention relates to a filing envelope for retaining papers in connection with legal matters and an object of the invention is to form such an envelope from a single sheet of heavy paper by 5 blanking out from the sheet the parts of the envelope which are to be folded, one upon another, to secure the desired shape and to provide securing strips and strips for reenforcing certain edge portions of the envelope and also to provide foldable tabs for strengthening and reenforcing the folding or bending lines of certain parts of the envelope where these parts are liable to become broken and torn along these lines by the continued folding of one part in relation to the other.

With the above and other ends in view the invention consists in the matters hereinafter set forth and as shown in the accompanying drawing,

wherein Figure 1 is an elevation of the blank which is to be folded along the dotted lines as indicated there- Fig. 2 is a similar view showing the blank in partly folded condition;

Fig. 3 is a perspective view of the blank showing the manner in which the blank is folded before being glued into position;

Fig. 4 is a front side elevation of the envelope complete, and

Fig. 5 is a perspective view of the envelope completed and as illustrative of an embodiment of the present invention.

The blank from which the envelope is formed as shown in Figure l is cut from a single sheet of heavy paper. This blank comprising integral 5 parts, the central part I forming, in the completed envelope, the back of the envelope, the portion 2 forms the front side of the envelope which is integral with the portion I and is adapted to be folded along the dotted line 3. Integral with the opposite side edge of the central part I, is a flap portion 4 which is to be folded along the dotted line 5 relative to the central or back portion I.

The free end or side of the front portion 2 of the blank is notched inwardly from its free end edge as at 8 and integral with the end edge portions of this part 2, are strips 6 which are adapted to be folded over and inwardly of the envelope upon the part 2 along the dotted line I without being glued down thereon, and thus, when so folded they not only form a reenforcement for this upper edge of the front side of the envelope at each side of this central notch 8 which is provided for the purpose of giving freer access to the papers or documents placed in the envelope, but also form 55 stop strips to engage over the upper edges of papers placed in the envelope and prevent them from slipping out when the envelope is open and turned with its open side down.

To reenforcethe ends of the envelope and to provide gluing'strips for securing the front 2 infolded position upon the back portion I,the blank shown inFig. 1 is formed-with strips 9 integral with the ends of the portion I and projecting. beyond the folding lines I0, these strips 9 being extended atone end integral with the flap por-' tion 4 and the end portions of these strips which extend beyond the bending line 5 for the flap 4, are severed along the lines I2, from the ends of the strips 9 to form tabs I I, the severing lines I2 extending at an angle less than a right angle to the lines I0 and meeting said lines It) near the folding line5 for the flap. 'These tabs II of the blank thus project outwardly in an'angular direction from the ends of the flap 4 and are integral with the ends of said flap, extending slightly beyond the folding line 5 so that when these flaps are folded inwardly and pressed against the face of the flap 4, they will cross the folding line 5 with said line extending across each tab and therefore after these tabs have been folded inwardly and glued flat upon the face of the flap 4 and adjacent corner portions of the central rectangular body or back portion I, when the flap is folded along the line 5 these reenforcing tabs I I will also be folded thereacross in the direction of their length, thus forming reenforcements for the corner portions of the flap 4 where they meet the back 7 the back portion I under constant folding of the flap in use.

The end strips 9 which are integral with the ends of the back portion I, form means for se{ curing the front side of the envelope to'the back I at the ends of the back and also reenforce the ends of the envelope, the front portion 2 being folded along the line 3 over the back I and the strips 9 then folded along the lines I0 over the end edges of the front 2 of the envelope and firmly glued down thereon, thus closing the ends of the envelope and reenforcing the same.

An envelope is therefore provided which is especially adapted for holding legal papers and for making a record of these papers upon its flat side or back I, this envelope being strengthened and reenforced at its ends by the folded over strips 9 and the bending line 5 of the fiap 4 being reenforced by the tabs II at the ends of the folding line 5 of the flap. A very strong and serviceable 7 envelope for the purpose is thus provided.

Having thus fully described my invention what I claim is:

1. An envelope formed from a blank of sheet material, said blank having a central rectangular 5 portion to form one side of the envelope, a portion integral with one edge of said central portion to form the other side of the envelope, and a portion integral with the opposite side edge of said central portion to form a flap for the envelope, said blank beingralso formed with end reenforcing strips to reenforce the ends of the envelope and end edges of the flaps, said strips being integral with the ends of said central portion and flap portion to be folded inwardly and across the folding line of said flap where it meets said central portion of the blank to reenforce the bending line between said flap portion and said center portion at the ends of said line.

2. An envelope formed from a single sheet of material and having a rectangular back portion, a front portion integral at one side edge with and folded over and upon said back portion, a flap portion integral with the other side edge of said back portion and foldable along the meeting line of said flap and back portions, the ends of said back portion being formed with strips folded over and secured to the outer side of the front portion at the ends of the envelope, and tabs integral with the ends of the flap portion at the ends of said strips and folded inwardly and secured down upon said flap and back portions and across the meeting line of the flap portion with the back portion to reenforce the envelope at the ends of the line of fold between said flap and back portions.

3. An envelope comprising a rectangular portion forming the back of the envelope, a front portion integral at one side with one side edge of the back portion and folded over and upon said back portion to form the front of the envelope, the free edge of said front portion being turned inwardly and free of the inner face thereof to project inwardly of the front portion and project over the edges of papers placed in the envelope, a flap portion integral with the opposite side edge of the back portion and folded along the meeting line of said flap and back portions, reenforcing strips integral with the ends of the back portion and folded over and down upon and secured to the outer face of the ends of the front portion, and tabs integral with the ends of the flap portion and folded inwardly and across the meeting .line of the flap and back portions and secured to the inner faces thereof to reenforce the envelope at the ends of the line of fold of the flap portion relative to the back portion.

4. An envelope comprising a back, a front integral therewith at one side edge of said back, a flap integral with the opposite side edge of said back and folded along the meeting line of said flap and back, the free edge of said front having a narrow inturned edge portion projecting toward said back at the upper edge of said front to project over the upper edges of papers placed Within the envelope, strips integral with the ends of said front and flap, said strips being severed transversely adjacent the line of fold of the flap, said line of severance being at other than a right angle to the end of the envelope to project across said folding line of said flap and secured to the inner face of said flap and back to reenforce said line of fold adjacent the ends of the envelope, said strips at the ends of said front being folded thereover and secured to the outer face of said front along the ends of the envelope.

MARK FARRELL. 

